Non-prescription drugs called over-the-counter (OTC) inhalers are used to temporarily relieve shortness of breath or moderate asthma symptoms. People with sporadic respiratory problems who don't need daily asthma maintenance treatment usually use them. The majority of over-the-counter inhalers contain bronchodilators, such as racepinephrine or epinephrine, which relax the muscles surrounding the airways to facilitate breathing. OTC inhalers are not a replacement for prescription inhalers or long-term asthma management drugs, even if they can provide immediate relief during mild flare-ups. Inappropriate or excessive use might cause adverse effects like lightheadedness, anxiety, or elevated heart rate.

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